Himam, Nadiah Sabrina, and Khoirul Umam. “Modelling Sukuk Waqf for Pesantren Economic Development”. Journal of Islamic Economics and Philanthropy 1, no. 1 (August 7, 2018): 1–23. Accessed December 6, 2025. https://ejournal.unida.gontor.ac.id/index.php/JIEP/article/view/2556.